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autoscale canvas based on browser dimensions.

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add more canvas scale options.
hide canvas element until scale is set.
This commit is contained in:
Colin McMillen 2019-09-25 10:24:31 -04:00
parent 2fe15e98fb
commit 0ebdf6f47f
2 changed files with 19 additions and 3 deletions
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5
index.html
View File

@ -22,7 +22,7 @@
</head>
<body>
<!-- SNES resolution: 256x224. 4x scaled: 1024 x 896. -->
<canvas id="canvas" width="256" height="224"></canvas>
<canvas id="canvas" width="256" height="224" style="display: none"></canvas>
<div id="fps"></div>
<div id="debug"></div>
<button id="1x">1x</button>
@ -30,6 +30,9 @@
<button id="3x">3x</button>
<button id="4x">4x</button>
<button id="5x">5x</button>
<button id="6x">6x</button>
<button id="7x">7x</button>
<button id="8x">8x</button>
<img src="res/tf/atlantis/tf_atlantis_tiles.png" id="atlantis" style="display: none">
<img src="res/tf/halloween/ghost1.png" id="ghost" style="display: none">
<script src="main.js"></script>

17
main.js
View File

@ -484,6 +484,17 @@ function setCanvasScale(scale) {
const canvas = document.getElementById('canvas');
canvas.style.width = '' + snesWidth * scale + 'px';
canvas.style.height = '' + snesHeight * scale + 'px';
debug('set scale to ' + scale + 'x');
canvas.style.display = '';
}
function setAutoCanvasScale() {
const snesWidth = 256;
const snesHeight = 224;
const widthAspect = Math.floor(window.innerWidth / snesWidth);
const heightAspect = Math.floor(window.innerHeight / snesHeight);
const scale = Math.min(widthAspect, heightAspect)
setCanvasScale(scale);
}
function init() {
@ -495,9 +506,11 @@ function init() {
document.getElementById('3x').onclick = () => setCanvasScale(3);
document.getElementById('4x').onclick = () => setCanvasScale(4);
document.getElementById('5x').onclick = () => setCanvasScale(5);
setCanvasScale(4);
document.getElementById('6x').onclick = () => setCanvasScale(6);
document.getElementById('7x').onclick = () => setCanvasScale(7);
document.getElementById('8x').onclick = () => setCanvasScale(8);
setAutoCanvasScale();
window.requestAnimationFrame(loop(world, gfx));
debug('initialized!');
}
init();